Re: [Gretl-users] non-linear Wald-Test

This is linked to a general modification of the effect of the "const" qualifier for matrix arguments: if you promise not to modify a matrix argument then you get the matrix "directly", not a copy. That is, it's the same, speed-wise, as passing a "pointer to matrix" (but it's an error if you try to modify the argument). I think the business of using the pointer formulation purely for speed-up in gretl was potentially a bit confusing; it's no longer necessary for matrices, just use "const" instead.